156805440 has 224 divisors, whose sum is σ = 561807360. Its totient is φ = 36710400.

The previous prime is 156805427. The next prime is 156805457. The reversal of 156805440 is 44508651.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327121 + ... + 327599.

Almost surely, 2^156805440 is an apocalyptic number.

156805440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156805440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280903680).

156805440 is an abundant number, since it is smaller than the sum of its proper divisors (405001920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156805440 is a wasteful number, since it uses less digits than its factorization.

156805440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 156805440 is about 12522.1978901469. The cubic root of 156805440 is about 539.2461359907.

The spelling of 156805440 in words is "one hundred fifty-six million, eight hundred five thousand, four hundred forty".